"Connecting to an EC2 Instance Using SSH: Easy Steps to Access Your Instance"

1. Gather EC2 Instance Details
   Public DNS (or Public IP): Identify the Public DNS (or IP address) of your EC2 instance. You can find this in the AWS Management Console under the Instances section.
   Key Pair File (.pem): Ensure you have the private key (.pem file) that was used when launching the instance. If you don’t have it, you might need to create a new key pair and associate it with your instance.

2. Set Permissions for Your Key Pair File
   Ensure that the permissions on your key pair file are set correctly to maintain security. In a terminal or command prompt, use the following command:
   bash
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   chmod 400 /path/to/your-key-pair.pem
   Replace /path/to/your-key-pair.pem with the actual path to your key pair file.

3. Open Your Terminal or Command Prompt
   Open a terminal window (Linux or macOS) or a command prompt (Windows).

4. Connect Using SSH
   Use the ssh command to connect to your EC2 instance. The syntax is:

bash
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ssh -i /path/to/your-key-pair.pem ec2-user@your-instance-public-dns
Replace:
/path/to/your-key-pair.pem: Path to your .pem file.
ec2-user: Username for your instance (can vary by operating system; for example, ubuntu for Ubuntu instances).
your-instance-public-dns: Public DNS (or IP address) of your EC2 instance.
For example:

bash
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ssh -i ~/Downloads/your-key-pair.pem ec2-user@ec2-11-22-33-44.compute-1.amazonaws.com

1. Authenticate and Connect
   If it’s your first time connecting to this instance, you may see a message about the authenticity of the host. Type yes to continue connecting.
   You should now be connected to your EC2 instance via SSH.

2. Post-Connection Tasks
   Once connected, you can execute commands on your EC2 instance terminal just like you would on a local terminal.
   Troubleshooting Tips:
   Security Group Settings: Ensure that your EC2 instance’s security group allows SSH access (port 22) from your current IP address or IP range.
   Instance State: Verify that your EC2 instance is running and reachable over the network.

This detailed guide should help you connect to your EC2 instance securely using SSH.